CD 194/195 [010] (embossed on top) HEMINGRAY 54-A (opposite side) MADE IN U.S.A. / 2-46 (embossed on bottom piece's skirt) HEMINGRAY-54-B (opposite side) MADE IN U.S.A. / 2-46, smooth base, purple, mint condition. Note that the mold numbers and date codes match! Books for $200-250. Will sell for $225 postpaid. This was used to transpose wires to decrease crosstalk on a telephone line. PayPal no fee option, check, or money order okay.